Theanine: Benefits & Side Effects - WebMD

18 Aug.,2025

 

Theanine: Benefits & Side Effects - WebMD

SOURCES:

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Fundukian, L.J. The Gale Encyclopedia of Alternative Medicine, 3rd edition, .

Memorial Sloan-Kettering Cancer Center: “About Herbs: Theanine,” "L-Theanine.” 

Natural Medicines Comprehensive Database web site: “Theanine.”

Rakel D. Integrative Medicine, 3rd edition, Saunders, .

Natural Standard: “Theanine (L-theanine).”

National Library of Medicine: “L-Theanine: A Unique Functional Amino Acid in Tea (Camellia sinensis L.) With Multiple Health Benefits and Food Applications,” “L-theanine and Caffeine Improve Sustained Attention, Impulsivity and Cognition in Children with Attention Deficit Hyperactivity Disorders by Decreasing Mind Wandering (OR29-04-19),” “Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial,” “Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses.” 

Cleveland Clinic: “Here’s What You Need To Know About L-Theanine.”

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DrugMart Pharmacy: “L-Theanine: Unlocking The Secrets To Relaxation, Anxiety Relief, And Better Sleep.” 

National Institutes of Health: “Ashwagandha: Is it helpful for stress, anxiety, or sleep?”

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